Fuel-burner.



UNITED STATES PATENT OFFICE.

cIIA LEs A. DALLY, or cARNo'r, PENNSYLVANIA, ASSIGNOR on ONE-HALF TONELSON E. WHITAKER, on WHEELING, WEST VIRGINIA.

FUEL-BURNER.

SPECIFICATION forming part of Letters Patent No. 701,800, dated June 3,1902.

Application filed May 25, 1901.

combination-burner for mixing and forcing into the furnace or fireplacesuch fuel mixtures as coal-dust, oil, and air.

With the above object in view the inven tion consists of the novelcombination and arrangement of parts, as shown in the accompanyingdrawings, in which- Figure 1 is a side elevation of my apparatus, partlyshown in section. Fig. 2 is a front view of one of the wheels removedfrom the interior of the apparatus.

In said drawings the numeral 1 represents a hopper. 2 is a flange atbase of said hopper, having an opening 3 therein.

4 is a miter gear-wheel'having a hollow shaft 5 projecting into thehopper-opening. 6 is a cup-shaped casting secured to the upper end ofsaid gear-shaft and is provided with suitable-shaped openings orperforations 7.

8 is the burner-pipe,which extends into the furnace or fireplace 9. 11is a chamber connected at its inner end to said burner-pipe and closedat its outer end by a head 12. 13 is an air-supply pipe connected tosaid chamber, and 14 is a bridge in the form of a cross formed in saidchamber. 15 is a hollow shaft rotatably mounted in said chamber, bridge,and head, said hollow shaft being closed at its inner end by aperforated head 16.. 17 is a step-cone pulley arranged upon said hollowshaft, and 18 is a spirally-formed feed-shaft extending up into thehopper and secured at its lower end to the said cup-shaped casting 6. 19is a miter gear-wheel secured upon said hollow shaft to mesh with saidgearwheel 4:, said gear 19 being provided with angularly-disposed vanesor arms 20.

In use as a burner and mixer with coalsteam-jet.

Serial No. 61,864. (No model.)

dust andoil as afu'el power is applied to the cone-pulley 17, whichcauses the gears to rotate the spiral shaft 18, thus agitating andfeeding. the coal-dust from the hopper to the burner. At the same timecompressed air is forced into the chamber 11 and burner-pipe through thepipe 13, and the oil is forced through the hollow shaft 15 by'means of aAs the air passes out of-the chamber 11 into the burner-pipe the blades20 of the spur gear-wheel 19 cause said air to swirl around andthoroughly mix the coal-dust and oil-Spray previous to passing into the'furnace.

Having thus fully shown and described my invention, What I claim'as new,and desire to secure by Letters Patent, is+

1. A coal-dust burner for furnaces, comprising a hopper for holding thecoal-dust; an air-chamber, a bladed gear-wheel mounted on a shaftrunning through said air-chamber; a perforated cup or shell looselyfitted in the baseof said hopper; a gear-wheel secured to said cup tomesh with the bladed gear-wheel; a spiral'bladed shaft connected to saidcup or shell to extend into said hopper; means to rotate said shafts,and means for introducing air under pressure to the air-chamber, allarranged and combined to operate as set forth.

2. A combined oil and coal-dust burner for furnaces, comprising aburner-pipe, a hopper connected to said burner-pipe; .an air-chamberconnected to saidpipe; a rotatable 'oilspraying pipe extending throughsaid airchamber into said burner-pipe; a bladed gearwheel mounted uponsaid rotatable pipe; a perforated cup or shell-loosely fitted in thebase of said hopper; a gear-wheel secured to said cup to mesh with saidoil-spray-pipe gear; a spiral bladed shaft connected to said cup orshellto extend into said hopper; means to rotate "said oil-spraying pipe, andmeans for introducingair under pressure to the airchamber, all arrangedandcombined to operate as shown and set forth.-

In testimony whereof I have hereunto affixed my signature in thepresence of two sub: scribing witnesses.

CHARLES A. DALLY.

Witnesses:

R. W. HAY, H. H. FOWLER.

